There are two things that confuse people when trying to remove a hook: The remove_action() or remove_filter() calls must take place after the add_action() or add_filter() calls, and before the hook is actually fired. This means that you must know the hook when the calls were added and when the hook is fired. The remove_action() … Read more
This will handle appending the content to single posts: function yourprefix_add_to_content( $content ) { if( is_single() ) { $content .= ‘Your new content here’; } return $content; } add_filter( ‘the_content’, ‘yourprefix_add_to_content’ );
A much better hook to use would the the update_option_{option_name} dynamic hook, which only runs after your specific option has been updated. So something like: add_action(‘update_option_woocommerce_email_send_time’, ‘send_time’) function update_send_time() { // Add code here to update cron job } The only problem you’ll get here is that scheduling the cron job for a time earlier … Read more
They were both introduced in version 2.9, but were done so in different files. update_postmeta went into /wp-admin/includes/post.php While… update_{$meta_type}_meta went into /wp-includes/meta.php It was only later that update_postmeta was shifted into /wp-includes/meta.php. So I believe it was for backward compatability, where by because the update_postmeta hook was always receiving the value of maybe_serialize() then … Read more
Short answer – Your original function (mostly) works. This is your function edited to do what it needs to do: function automatically_log_me_in( $user_id ) { wp_set_current_user( $user_id ); wp_set_auth_cookie( $user_id ); wp_redirect( home_url( ‘/some-ending-page/’ ) ); exit(); } add_action( ‘user_register’, ‘automatically_log_me_in’ ); Long answer – here is an explanation of why this is the answer. … Read more
Use get_current_blog_id() to check the current site. To run on site 2 only, use this: function new_meta_values($order_id) { if ( 2 !== get_current_blog_id() ) return; /* the rest of the function code */ }
I guess you mean add_action( ‘pre_get_posts’, ‘private_groups’ ); add_action( ‘pre_get_posts’, ‘search_results’ ); add_action( ‘pre_get_posts’, ‘name_profiles’ ); versus add_action( ‘pre_get_posts’, ‘combined_into_single_callback’ ); You can just check the difference using e.g. memory_get_usage() and timer_stop(). Many good plugins out there to help with that. I would say go with the first one, as they seems to be unrelated … Read more
I am confused because add_filter uses the word add when I feel like it is more on the lines of replace or overwrite (unless I am misunderstanding) You are misunderstanding. Both add_action and add_filter insert function callbacks into a kind of queue. You can add many callbacks to the same hook and they will fire … Read more
In my projects I do it like that PHP function foo() { echo ‘bar’; } add_action(‘wp_ajax_foo’, ‘foo’ ); // executed when logged in add_action(‘wp_ajax_nopriv_foo’, ‘foo’ ); // executed when logged out Javascript data = { action: ‘foo’, avalue: ‘some value’, ‘anothervalue’: ‘another value’ }; jQuery.post(ajaxurl, data, function(response){ alert(response); });
Don’t touch the load order, change the activation order instead. A working example can be found in this answer.